27ef2ca86b
This makes it easier to see what's left unattached as new drivers are written, and to see what drivers get attached to what nodes.
314 lines
7.9 KiB
C
314 lines
7.9 KiB
C
/*-
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* Copyright (c) 2015 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/clock.h>
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#include <sys/cpu.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <sys/endian.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#include "clock_if.h"
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#include "opal.h"
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static int opaldev_probe(device_t);
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static int opaldev_attach(device_t);
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/* clock interface */
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static int opal_gettime(device_t dev, struct timespec *ts);
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static int opal_settime(device_t dev, struct timespec *ts);
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/* ofw bus interface */
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static const struct ofw_bus_devinfo *opaldev_get_devinfo(device_t dev,
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device_t child);
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static void opal_shutdown(void *arg, int howto);
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static void opal_intr(void *);
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static device_method_t opaldev_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, opaldev_probe),
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DEVMETHOD(device_attach, opaldev_attach),
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/* clock interface */
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DEVMETHOD(clock_gettime, opal_gettime),
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DEVMETHOD(clock_settime, opal_settime),
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/* Bus interface */
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DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, opaldev_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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DEVMETHOD_END
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};
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static driver_t opaldev_driver = {
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"opal",
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opaldev_methods,
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0
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};
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static devclass_t opaldev_devclass;
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DRIVER_MODULE(opaldev, ofwbus, opaldev_driver, opaldev_devclass, 0, 0);
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static int
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opaldev_probe(device_t dev)
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{
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phandle_t iparent;
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pcell_t *irqs;
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int i, n_irqs;
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if (!ofw_bus_is_compatible(dev, "ibm,opal-v3"))
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return (ENXIO);
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if (opal_check() != 0)
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return (ENXIO);
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device_set_desc(dev, "OPAL Abstraction Firmware");
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/* Manually add IRQs before attaching */
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if (OF_hasprop(ofw_bus_get_node(dev), "opal-interrupts")) {
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iparent = OF_finddevice("/interrupt-controller@0");
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iparent = OF_xref_from_node(iparent);
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n_irqs = OF_getproplen(ofw_bus_get_node(dev),
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"opal-interrupts") / sizeof(*irqs);
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irqs = malloc(n_irqs * sizeof(*irqs), M_DEVBUF, M_WAITOK);
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OF_getencprop(ofw_bus_get_node(dev), "opal-interrupts", irqs,
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n_irqs * sizeof(*irqs));
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for (i = 0; i < n_irqs; i++)
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bus_set_resource(dev, SYS_RES_IRQ, i,
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ofw_bus_map_intr(dev, iparent, 1, &irqs[i]), 1);
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free(irqs, M_DEVBUF);
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}
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return (BUS_PROBE_SPECIFIC);
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}
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static int
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opaldev_attach(device_t dev)
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{
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phandle_t child;
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device_t cdev;
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uint64_t junk;
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int i, rv;
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struct ofw_bus_devinfo *dinfo;
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struct resource *irq;
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/* Test for RTC support and register clock if it works */
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rv = opal_call(OPAL_RTC_READ, vtophys(&junk), vtophys(&junk));
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do {
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rv = opal_call(OPAL_RTC_READ, vtophys(&junk), vtophys(&junk));
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if (rv == OPAL_BUSY_EVENT)
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rv = opal_call(OPAL_POLL_EVENTS, 0);
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} while (rv == OPAL_BUSY_EVENT);
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if (rv == OPAL_SUCCESS)
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clock_register(dev, 2000);
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EVENTHANDLER_REGISTER(shutdown_final, opal_shutdown, NULL,
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SHUTDOWN_PRI_LAST);
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/* Bind to interrupts */
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for (i = 0; (irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
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RF_ACTIVE)) != NULL; i++)
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bus_setup_intr(dev, irq, INTR_TYPE_TTY | INTR_MPSAFE |
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INTR_ENTROPY, NULL, opal_intr, (void *)rman_get_start(irq),
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NULL);
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for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
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child = OF_peer(child)) {
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dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
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if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
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free(dinfo, M_DEVBUF);
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continue;
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}
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cdev = device_add_child(dev, NULL, -1);
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if (cdev == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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dinfo->obd_name);
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ofw_bus_gen_destroy_devinfo(dinfo);
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free(dinfo, M_DEVBUF);
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continue;
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}
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device_set_ivars(cdev, dinfo);
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}
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return (bus_generic_attach(dev));
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}
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static int
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bcd2bin32(int bcd)
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{
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int out = 0;
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out += bcd2bin(bcd & 0xff);
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out += 100*bcd2bin((bcd & 0x0000ff00) >> 8);
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out += 10000*bcd2bin((bcd & 0x00ff0000) >> 16);
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out += 1000000*bcd2bin((bcd & 0xffff0000) >> 24);
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return (out);
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}
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static int
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bin2bcd32(int bin)
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{
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int out = 0;
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int tmp;
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tmp = bin % 100;
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out += bin2bcd(tmp) * 1;
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bin = bin / 100;
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tmp = bin % 100;
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out += bin2bcd(tmp) * 100;
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bin = bin / 100;
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tmp = bin % 100;
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out += bin2bcd(tmp) * 10000;
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return (out);
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}
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static int
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opal_gettime(device_t dev, struct timespec *ts)
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{
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int rv;
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struct clocktime ct;
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uint32_t ymd;
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uint64_t hmsm;
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rv = opal_call(OPAL_RTC_READ, vtophys(&ymd), vtophys(&hmsm));
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while (rv == OPAL_BUSY_EVENT) {
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opal_call(OPAL_POLL_EVENTS, 0);
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pause("opalrtc", 1);
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rv = opal_call(OPAL_RTC_READ, vtophys(&ymd), vtophys(&hmsm));
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}
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if (rv != OPAL_SUCCESS)
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return (ENXIO);
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hmsm = be64toh(hmsm);
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ymd = be32toh(ymd);
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ct.nsec = bcd2bin32((hmsm & 0x000000ffffff0000) >> 16) * 1000;
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ct.sec = bcd2bin((hmsm & 0x0000ff0000000000) >> 40);
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ct.min = bcd2bin((hmsm & 0x00ff000000000000) >> 48);
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ct.hour = bcd2bin((hmsm & 0xff00000000000000) >> 56);
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ct.day = bcd2bin((ymd & 0x000000ff) >> 0);
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ct.mon = bcd2bin((ymd & 0x0000ff00) >> 8);
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ct.year = bcd2bin32((ymd & 0xffff0000) >> 16);
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return (clock_ct_to_ts(&ct, ts));
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}
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static int
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opal_settime(device_t dev, struct timespec *ts)
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{
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int rv;
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struct clocktime ct;
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uint32_t ymd = 0;
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uint64_t hmsm = 0;
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clock_ts_to_ct(ts, &ct);
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ymd |= (uint32_t)bin2bcd(ct.day);
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ymd |= ((uint32_t)bin2bcd(ct.mon) << 8);
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ymd |= ((uint32_t)bin2bcd32(ct.year) << 16);
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hmsm |= ((uint64_t)bin2bcd32(ct.nsec/1000) << 16);
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hmsm |= ((uint64_t)bin2bcd(ct.sec) << 40);
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hmsm |= ((uint64_t)bin2bcd(ct.min) << 48);
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hmsm |= ((uint64_t)bin2bcd(ct.hour) << 56);
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hmsm = htobe64(hmsm);
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ymd = htobe32(ymd);
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do {
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rv = opal_call(OPAL_RTC_WRITE, vtophys(&ymd), vtophys(&hmsm));
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if (rv == OPAL_BUSY_EVENT) {
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rv = opal_call(OPAL_POLL_EVENTS, 0);
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pause("opalrtc", 1);
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}
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} while (rv == OPAL_BUSY_EVENT);
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if (rv != OPAL_SUCCESS)
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return (ENXIO);
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return (0);
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}
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static const struct ofw_bus_devinfo *
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opaldev_get_devinfo(device_t dev, device_t child)
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{
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return (device_get_ivars(child));
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}
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static void
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opal_shutdown(void *arg, int howto)
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{
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if (howto & RB_HALT)
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opal_call(OPAL_CEC_POWER_DOWN, 0 /* Normal power off */);
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else
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opal_call(OPAL_CEC_REBOOT);
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opal_call(OPAL_RETURN_CPU);
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}
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static void
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opal_intr(void *xintr)
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{
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uint64_t events = 0;
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opal_call(OPAL_HANDLE_INTERRUPT, (uint32_t)(uint64_t)xintr,
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vtophys(&events));
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/* XXX: do something useful with this information */
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}
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